(例8)矩阵键盘数字输入.doc

/*绿盾电子 X-13 多传感器开发板功能：驱动数码管显示数据时间：2011-8-23*/*/包含头文件#include#include/*/typedef unsigned char uint8; /定义8位无符号变量typedef unsigned int uint16; /定义16位无符号变量typedef unsigned char uchar;typedef unsigned int uint;typedef unsigned long ulong;/*/定义引脚(根据硬件改变)sbit BCD6 = P15;sbit BCD5 = P14;sbit BCD4 = P13;sbit BCD3 = P12;sbit BCD2 = P11;sbit BCD1 = P10;#define BCD_PORTP0#define KeyBroadP2sbit KeyBroad1 = KeyBroad 7;sbit KeyBroad2 = KeyBroad 6;sbit KeyBroad3 = KeyBroad 5;sbit KeyBroad4 = KeyBroad 4;sbit KeyBroad5 = KeyBroad 3;sbit KeyBroad6 = KeyBroad 2;sbit KeyBroad7 = KeyBroad 1;sbit KeyBroad8 = KeyBroad 0;/*/code uint8 BCD=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef,0x40; /定义数字显示数组为常量,共阴极 / /*0,1,2,3,4,5,6,7,8,9,0.,1.,2.,3.,4.,5.,6.,7.,8.,9.,-/函数声明/*/void delay(unsigned int time); void DisplayBCD(ulong temp);/*/延时子函数 /参数范围 0-65536 us 12MHzvoid delay(unsigned int time) /参数 time 大小 /决定延时时间长短while(time-);/*/毫秒级延时函数void mDelay(uchar delay) uchar i; for(;delay0;delay-) for(i=150;i0;i-); /*/数码管显示函数void DisplayBCD(ulong temp) BCD_PORT = BCDtemp / 100000;BCD6 = 0;mDelay(10);BCD6 = 1;BCD_PORT = BCDtemp / 10000 %10;BCD5 = 0;mDelay(10);BCD5 = 1;BCD_PORT = BCDtemp / 1000 %10;BCD4 = 0;mDelay(10);BCD4 = 1;BCD_PORT = BCDtemp / 100 %10;BCD3 = 0;mDelay(10);BCD3 = 1;BCD_PORT = BCDtemp / 10 %10;BCD2 = 0;mDelay(10);BCD2 = 1;BCD_PORT = BCDtemp %10;BCD1 = 0;mDelay(10);BCD1 = 1;/*/键盘扫描函数uchar ScanKey(void)KeyBroad = 0xff;KeyBroad1 = 0;if(KeyBroad8 = 0)mDelay(50);if(KeyBroad8 = 0)return 0x00;if(KeyBroad7 = 0)mDelay(50);if(KeyBroad7 = 0)return 0x01;if(KeyBroad6 = 0)mDelay(50);if(KeyBroad6 = 0)return 0x02;if(KeyBroad5 = 0)mDelay(50);if(KeyBroad5 = 0)return 0x03;KeyBroad = 0xff;KeyBroad2 = 0;if(KeyBroad8 = 0)mDelay(50);if(KeyBroad8 = 0)return 0x04;if(KeyBroad7 = 0)mDelay(50);if(KeyBroad7 = 0)return 0x05;if(KeyBroad6 = 0)mDelay(50);if(KeyBroad6 = 0)return 0x06;if(KeyBroad5 = 0)mDelay(50);if(KeyBroad5 = 0)return 0x07;KeyBroad = 0xff;KeyBroad3 = 0;if(KeyBroad8 = 0)mDelay(50);if(KeyBroad8 = 0)return 0x08;if(KeyBroad7 = 0)mDelay(50);if(KeyBroad7 = 0)return 0x09;if(KeyBroad6 = 0)mDelay(50);if(KeyBroad6 = 0)return 0x0a;if(KeyBroad5 = 0)mDelay(50);if(KeyBroad5 = 0)return 0x0b;KeyBroad = 0xff;KeyBroad4 = 0;if(KeyBroad8 = 0)mDelay(50);if(KeyBroad8 = 0)return 0x0c;if(KeyBroad7 = 0)mDelay(50);if(KeyBroad7 = 0)return 0x0d;if(KeyBroad6 = 0)mDelay(50);if(KeyBroad6 = 0)return 0x0e;if(KeyBroad5 = 0)mDelay(50);if(KeyBroad5 = 0)return 0x0f;Key